Boston Partners
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Boston Partners’s Axcelis ACLS Stock Holding History

Boston Partners’s Portfolio ACLS Stock Details ACLS Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$31.8M Sell
340,275
-82,160
-19% -$7.28M 0.03% 316
2025
Q4 		$35.1M Sell
422,435
-46,306
-10% -$3.88M 0.04% 305
2025
Q3 		$44.9M Sell
468,741
-5,302
-1% -$427K 0.05% 272
2025
Q2 		$33.6M Buy
474,043
+141,004
+42% +$8.04M 0.04% 291
2025
Q1 		$16.3M Buy
333,039
+2,966
+0.9% +$188K 0.02% 340
2024
Q4 		$23.1M Buy
330,073
+84,481
+34% +$7.02M 0.03% 320
2024
Q3 		$25.2M Buy
245,592
+81
+0% +$9.47K 0.03% 305
2024
Q2 		$33.7M Buy
245,511
+53,251
+28% +$6.14M 0.04% 267
2024
Q1 		$20.8M Buy
+192,260
New +$22.9M 0.02% 320
2023
Q1 		– Sell
-16,045
Closed -$1.27M – 693
2022
Q4 		$1.27M Buy
16,045
+4,569
+40% +$322K ﹤0.01% 489
2022
Q3 		$695K Buy
11,476
+2,061
+22% +$133K ﹤0.01% 555
2022
Q2 		$516K Buy
9,415
+2,428
+35% +$141K ﹤0.01% 602
2022
Q1 		$528K Sell
6,987
-7,852
-53% -$536K ﹤0.01% 615
2021
Q4 		$1.11M Sell
14,839
-47,450
-76% -$2.81M ﹤0.01% 518
2021
Q3 		$2.93M Sell
62,289
-18,451
-23% -$803K ﹤0.01% 417
2021
Q2 		$3.26M Sell
80,740
-48,127
-37% -$1.99M ﹤0.01% 407
2021
Q1 		$5.29M Buy
128,867
+33,716
+35% +$1.26M 0.01% 383
2020
Q4 		$2.77M Buy
95,151
+7,090
+8% +$183K ﹤0.01% 399
2020
Q3 		$1.94M Sell
88,061
-22,852
-21% -$583K ﹤0.01% 428
2020
Q2 		$3.09M Buy
110,913
+1,591
+1% +$38.8K 0.01% 384
2020
Q1 		$2M Buy
+109,322
New +$2.54M ﹤0.01% 421

Other funds holding ACLS

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
RP
Reinhart Partners Mequon, Wisconsin $4.38B AUM 55.55% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Balyasny Asset Management
Balyasny Asset Management Chicago, Illinois $77.1B AUM 42.89% 1-Year Est. Return
Victory Capital Management
Victory Capital Management San Antonio, Texas $156B AUM 27.51% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
BNP Paribas Asset Management
BNP Paribas Asset Management Paris, France $86.1B AUM 29.11% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

Boston Partners's ACLS Position: Q1 2026 in Review

Boston Partners reduced its Axcelis (ACLS) stake by 19% in Q1 2026, selling an estimated $7.28M and leaving 340,275 shares worth $31.8M. The position accounts for 0.03% of the portfolio, ranked #316.

Boston Partners first reported a position in ACLS in Q1 2020 and has held it in 21 quarters since. The position peaked at $44.9M in Q3 2025. 377 funds tracked by Wall St. Rank hold ACLS as of Q1 2026.

  • Boston Partners held 340,275 shares of Axcelis worth $31.8M as of Q1 2026.
  • Boston Partners sold 82,160 Axcelis shares in Q1 2026, an estimated $7.28M.
  • Axcelis made up 0.03% of Boston Partners's portfolio in Q1 2026, its #316 holding.
  • Boston Partners first reported a position in Axcelis in Q1 2020 and has held it in 21 quarters since.
  • Boston Partners's Axcelis position peaked at $44.9M in Q3 2025.
  • 377 funds tracked by Wall St. Rank held Axcelis as of Q1 2026.

Based on Boston Partners's 13F filing for Q1 2026, filed 11 May 2026.